Winding pitch changer of a stator-winding machine

ABSTRACT

A winding pitch changer of a stator-winding machine comprises a changeover transmission for swinging a winding head and connected mechanically with an adjusting mechanism, the changeover transmission being in the form of a ratchet with a retainer linked kinematically with a former cam which is connected mechanically with a slide located in the slot of a link mechanism which rotates the winding head rod, the slide being moved at the moment when the ratchet is braked by the adjusting mechanism. The adjusting mechanism comprises a spring-loaded slide provided at one end with a stop interacting with a splined disc and a roller interacting with a cam which is kinematically linked with the splined disc while at the other end it has a tooth for braking the ratchet at the moment of the pitch change.

I United States Patent [72] Inventors Alexandr Andreevich Bondarenko 3,081,043 3/1963 Morrill 242/ 1.1 Moskovsky pmspekt, 198/2, Kv. 69; 3,193,208 7/1965 Brueggemann.... 242/1.l Fedor Grigorievich Klevamv, ulitsa 3,253,793 5/1966 Morey et aL. 242/ l .1 Kotovskogo, 62-9, Kharkov, U.S.S.R. 3,347,474 10/1967 Frank 242/ 1.1 [2!] P 835170 Primary Examiner-Fred C. MatternJr. [22] Filed June 20, 1969 As E w l S R trff J 45 Patented May 25 1971 i ey a I l AttorneyWaters, Rodin, Schwartz & Nissen 4 WINDINGPITCHCHANGEROFASTAT R- zfifisffipzszfiz izinztz's;testis;

2 C 5 winding head and connected mechanically with an adjusting m 74/96 mechanism, the changeover transmission being in the form of 74/23 242l a ratchet with a retainer linked kinematically with a former 1 llll- 6122/44, cam which is connected mechanically with a slide located in H1611 21/00, B65h 81/06 the slot of a link mechanism which rotates the winding head of Search u 97, rod the slide being moved at the moment when the ratchet is 23; 242/1-1 braked by the adjusting mechanism. The adjusting mechanism comprises a spring-loaded slide provided at one end with a [s6] Rem-em Cited stop interacting with a splined disc and a roller interacting UNITED STATES PATENTS with a cam which is kinematically linked with the splined disc 2,949,789 8/1960 Eminger 74/23 while at the other end it has a tooth for braking the ratchet at 3,052,418 9/ 1962 Gorski et a]. 74/23 the moment of the pitch change.

WINDING PITCH CHANGER OF A STATOR-WINDING MACHINE and a winding pitch changer controlled by the counter.

A disadvantage of these devices lies in the necessity to stop the machine when changing over from winding a section with a certain pitch to winding another section with a different pitch. When the machine is stopped, the winding mechanism is moved to the required position by means of a special drive after which the winding mechanism is shifted over to a new pitch and the machine is started for winding the next section.

An object of the present invention is to provide a device in which the aforesaid disadvantages are eliminated.

Another object of the invention is to provide a device for automating the winding pitch change on a running machine, without stopping it at the moment of changing over from one winding pitch to another.

According to the invention, this object is achieved by providing a winding pitch changer of a stator-winding machine with a changeover transmission for swinging the winding head rod and an adjusting mechanism wherein the changeover transmission consists of a ratchet with a retainer, operatively connected with a former cam which latter is connected mechanically with a slide located in the slot of a link mechanism rotating the winding head rod, said slide moving in the slot of the link mechanism at the moment when the ratchet is braked by the adjusting mechanism.

It is practicable for the adjusting mechanism to be made in the form of a spring-loaded slide, provided with a stop at one end, interacting with a splined disc, and a roller interacting with a cam, which is operatively connected with the splined disc, whereas the second end of the slide has a tooth for braking the ratchet at the moment of change.

The changer can also be used in machines in which the main motions of the winding head (longitudinal and turning motions) are ensured by a planetary mechanism which simplifies the kinematics of the machine, reduces its overall dimensions, improves the smoothness of its running and its general dependability.

The pitch changer is simple in control, has a rigid kinematic linkage between units, does not require any complex hydraulic or electric devices which increases its reliability, reduces costs and does not require skilled labor.

Now the invention will be described in detail by way of example with reference to the accompanying drawing, in which:

FIG. 1 is a sectional view of the changer according to the invention;

FIG. 2 is a side view of the winding head rod;

FIG. 3 is a side view of the ratchet;

FIG. 4 is a developed view of the former cam;

FIG. 5 is a diagram showing the functioning of the changeover slide interacting with the counter disc and cam.

The winding pitch changer is constructed as follows. A drive shaft 1 (FIGS. 1, 2) is rigidly connected to a lever 2 having a slot which accommodates a slide 3. The lower end of the slide 3 is provided with a rack. The shaft 1 together with the lever 2 makes angular oscillations during winding about axis A through a constant angle [3 of 130 being driven by turning mechanism (omitted in the diagram). Press fitted in the slide 3 is a pin 4 articulated to a slide 5. Theslide 5 is located in the slot of a link mechanism 6 which imparts angular oscillations to a winding head rod 7 around axis B in the directions shown by arrows 8 and 9. Longitudinal motion in the directions shown by arrows l and 11 along the slots of a stationary stator 12 is imparted to the rod 7 by a longitudinal motion mechanism (omitted in the diagram). The slide can move along the slot of the link mechanism 6 thereby changing the rotation angle of the rod 7. Thus, while winding a three-section coil group, when the slide 5 moves from the axis A from point r, to point r and r;, the rotation angle of the rod 7 changes from a, correspondingly to a and 0: to suit the required winding pitch.

The rack end of the slide 3 engages a gear 13 mounted on the lever 2 and rotatable around the axis C.

At the other side the gear 13 engages a rack 14 which can move along the slot in the shaft 1 along its axis A. A shaped former cam 15 is rigidly connected to the rack 14.

The external surface of the former cam 15 has a closed shaped groove 16 with sections l7, l8, 19 (FIG. 4) interconnected by inclined surfaces.

The groove 16 of the former cam 15 accommodates a roller 20 which is connected by an axle 21 (FIG. 1) with a threetooth ratchet 22. The ratchet 22 rotates around the axis Aand can occupy three positions in relation to the shaft 1, being held in these positions by a retainer 23. The former cam 15 is so installed with respect to the ratchet 22 that when the latter occupies a fixed position, the roller 20 is located on one of the sections of the former cam 15.

The ratchet 22 is controlled by a changeover slide 24 which interacts through a stop 25 with a disc 26 which is splined around the circumference, while a tooth 27 of the slide 24 in teracts with the ratchet 22. Secured on the slide 24 is a roller 28 which interacts with a cam 29 (FIGS. 1 and 5).

The disc 26 is rotated by a counter and makes one revolution around the axis D within the winding cycle of the coil group. The sections of the disc surface between the splines 30 are proportional to the number of turns of the corresponding sections of the coils being wound. The cam 29 makes one revolution around the axis E within the period required for winding one turn. The motion of the cam 29 .is linked kinematically with that of the disc 26.

The winding pitch changer operates as follows.

On starting the machine, the shaft '1 with the lever 2, swinging at a constant angle B of rotates the rod 7 by means of the slides 3 and 5 and the link mechanism 6 through an angle B corresponding to the pitch of the smaller section. In this case the slide Sis set at a distance r from the axis A of the shaft 1. The former cam 15 and ratchet 22 rotate together with the shaft 1 and the roller 20 is in the section 17 of the groove 16 of the former cam 15; the ratchet 22 is kept against turning with respect to the former cam 15 by the retainer 23. Meanwhile, the rack 14 with the former cam 15 do not move longitudinally.

The ratchet 22 is so installed with respect to the slide 24 that at the moment of its turning to the extreme left position through an angle of 130 the working surface 31 (FIG. 3) of the tooth '32 of the ratchet 22 engages the working surface 33 of the tooth 27 of the slide 24 through an angle of 10. In this case the tooth 32 of the ratchet 22 does not engage the tooth 27 of the slide 24 (FIG. 1) because the slide 24 actuated by the spring 34 bears by its stop 25 upon the surface 35 of the disc 26. The slide 24 can move downward, until it engages the ratchet, only when the spline 30 of the disc 26 comes to the stop 25. After the disc 26 has counted a required member of turns of the small section its spline 30 reaches the stop25 of the slide 24, the slide 24 simultaneously moving downwards in the directions of the arrow 36. At this moment the ratchet 22 occupies the extreme left position (FIG. 3). The cam 29 (FIG. 5) is installed in such a manner that when the spline 30 (FIG. 1) of the disc 26 approaches the stop 25 it allows the slide 24 to descend.

After the movement of the slide 24, the ratchet 22 turns to the right and its tooth 32 engages the lowered tooth 27 of the slide 24, being retained by it.

The shaft 1 continues turning together with the former cam 15, until it completes the entire turning angle of l30while the ratchet 22 arrested by the tooth 27 of the slide 24 remains in place. The former cam 15 turns with respect to the ratchet 22 and is moved by the roller 20 along the axis A through a distance H (FIG. 4) while via the system of rack 14 gear 13 and the rack of slide 3, the former cam 15 shifts'the slide 5 into the position which corresponds to the distance between the slide and the axis A of the shaft 1 equal to r Inasmuch as the angle of rotation of the shaft 1 is constant, the turning angle of the ,rod 7 changes by an angle equal to [3 Thus, the pitch is changed automatically within the period of turning of the rod 7 with the winding head. After the completion of the turn, in the course of the longitudinal motion of the rod 7, the slide 24 is pushed by the cam 29 via the roller 28 upward to the initial position.

Then the cycle is repeated over again. The pitch is changed at a definite point of the section turn.

The design and operation of the device is described on the basis of a machine intended for winding a three-section coil group.

We claim:

1. A winding pitch changer of a winding head rod of a stator-winding transmission for swinging the winding head rod, said transmission comprising a former cam, a ratchet with a retainer kinematically linked with said former cam and with said adjusting mechanism for being braked by the latter upon pitch change, a link mechanism coupled to the winding head rod to rotate the same, and a slide located in a slot provided in said link mechanism, said former cam being connected mechanically with said slide, said slide being moved in the slot of said link mechanism by said adjusting mechanism at the moment of braking of said ratchet by the adjusting mechanism.

2. A winding pitch changer according to. claim 1 wherein the adjusting mechanism comprises a spring-loaded slide provided at one end with a stop, a splined disc interactjpg with said stop, a roller on the spring-loaded slide, a cam kinematically linked with the splined disc and interacting with the roller, said spring-loaded slide at the other end thereof including a tooth for braking said ratchet of the changeover transmission at the moment of pitch change. 

1. A winding pitch changer of a winding head rod of a statorwinding transmission for swinging the winding head rod, said transmission comprising a former cam, a ratchet with a retainer kinematically linked with said former cam and with said adjusting mechanism for being braked by the latter upon pitch change, a link mechanism coupled to the winding head rod to rotate the same, and a slide located in a slot provided in said link mechanism, said former cam being connected mechanically with said slide, said slide being moved in the slot of said link mechanism by said adjusting mechanism at the moment of braking of said ratchet by the adjusting mechanism.
 2. A winding pitch changer according to claim 1 wherein the adjusting mechanism comprises a spring-loaded slide provided at one end with a stop, a splined disc interacting with said stop, a roller on the spring-loaded slide, a cam kinematically linked with the splined disc and interacting with the roller, said spring-loaded slide at the other end thereof including a tooth for braking said ratchet of the changeover transmission at the moment of pitch change. 